摘要
对光拍法光速测量仪进行了简单的改造,研究了光拍法测光速实验中的声光效应.实验简单易行,声光效应产生的频移直观可见,并可得到频移量与超声波频率的关系.在光拍法测光速教学实验中增加对声光效应的研究有利于更好地理解声光效应及其在光拍法测光速中的应用.
Acoustic-optic effect in the experiment measuring for the speed of light with optical beat is studied based on modification of the light speed apparatus LM2000C. This modification makes frequency shift of the scattered light visible on an oscilloscope. Student can obtain the relationship between frequency shift and the modulated ultrasonic frequency. This help them to get better understanding of acoustic-optic effect and optical beat formation in the experiment measuring for the speed of light with optical beat.
出处
《大学物理》
北大核心
2014年第3期51-54,共4页
College Physics
关键词
声光效应
共焦球面扫描干涉仪
光拍
Acoustic-optic effect
scanning confocal interferometer
optical beat
